| 1. | Peak signal to noise ratio , psnr
通过比较降噪前后的峰值信噪比 |
| 2. | Experiments are performed on monochrome and color image sequences , and performance is measured by the peak signal to noise ratio ( psnr )
最后分别对单色和彩色图像序列进行了实验，利用峰值信噪比( psnr )来度量算法的性能。 |
| 3. | Experiment results show that in low bit rate environment , the new image compression scheme performs better than jpeg in the aspects of perception and psnr ( peak signal noise ratio )
实验结果表明该算法在低码率下，相比jpeg ，获得了在视觉效果和峰值信噪比方面更好的恢复图像质量。 |
| 4. | Simulation results show that the ringing artifacts around the image are reduced , the main information is preserved , and the peak signal to noise ratio ( psnr ) is higher than the known methods
仿真计算表明,该方法可有效抑制图像边界的振铃效应并保护了图像的重要信息,并且比现有的方法具有更高的峰值信噪比。 |
| 5. | On the other hand , image quality measures haven ’ t been improved correspondingly . the most popular image quality assessment ( iqa ) is still traditional methods whose representative is psnr ( peak signal - to - noise ratio )
在对图像质量要求愈来愈高的今天,传统的图像质量评价算法已无法提供令人满意的结果,成为图像处理技术的薄弱环节。 |
| 6. | Based on adaptive quad - tree fractal image encoding scheme , the concept and algorithm of peak signal noise ratio ( psnr ) based on the fractal codes is put forward , and is used to match the similarities between images
本文以自适应四叉树分割的分形图像编码为基础，提出了图像的分形码峰值信噪比的概念和算法，在无须解码的情况下，直接对分形码来量化图像间的相似性。 |
| 7. | In the final , we evaluated and analyzed the quality of a series of compressed images with the fuzzy image and psnr ( peak signal - to - noise ratio ) measurement . we have also made some other experiments such as add noise to the images and so on
然后用峰值信噪比和本文提出的模糊图像度量分别对一系列压缩后的图像质量进行评价，并且分析了它们的评价结果，最后还进行了对图像添加各种噪声等实验。 |
| 8. | Simulation results show that both objective gains measured in psnr ( peak signal - to - noise ratio ) and visual improvements of reconstructed video can be achieved by utilizing introduced methods . chapter 5 gives the implementation of jvt - based nwarq technique
实验结果表明，各改进算法能不同程度地提高和改善重建图像的峰值信噪比( psnr )和主观质量；第五章研究、实现并测试了基于jvt视频编码标准的无等待arq技术。 |
| 9. | In order to assess the performance of the proposed methods , we propose three types of image measures to quantify the performance compared to some other methods . the first type evaluates the fidelity of the reconstructed image by computing the peak signal - to - noise ratio and euclidean distance in cielab color space between the original and reconstructed image in smooth and edge regions respectively . the second type accounts for a major artifact ? zipper effect
为了评估算法质量,本文采用了三类评估手段:一是分别计算原始图像与重构图像在平滑区域与边界区域的峰值信噪比与cielab颜色空间的欧氏距离来分析重构图像的保真度;二是利用数学手段对重构图像的一类主要失真现象? ? zipper效应进行定量评估;三是对硬件实现的成本与实际可行性进行了分析。 |
| 10. | The taboo - search algorithm and the ordinary genetic algorithm are combined in this paper and the new algorithm is named taboo - genetic algorithm . the new algorithm is applied into the matching search of domain and range in fractal image coding . the result shows that the coding time is decreased greatly when the compression ration and the peak signal and noise ration do not decline
后来把禁忌搜索算法与简单遗传算法相结合，提出了一种新的禁忌搜索遗传算法，并应用于分形图像压缩编码的定义域、值域匹配搜索，从而在不降低峰值信噪比和压缩比的情况下极大地改善了分形图像压缩编码的速度。 |
